Palpable, a.
Etymology: [F. palpable, L. palpabilis, fr. palpare to feel, stroke; cf. palpus the soft palm of the hand.]
1. Capable of being touched and felt; perceptible by the touch; as, a palpable form. Shak. Darkness must overshadow all his bounds, Palpable darkness. Milton.
2. Easily perceptible; plain; distinct; obvious; readily perceived and detected; gross; as, palpable imposture; palpable absurdity; palpable errors. "Three persons palpable." P. Plowman. [Lies] gross as a mountain, open, palpable. Shak. -- Pal"pa*ble*ness, n. -- Pal"pa*bly, adv.
Shades of meaning
Fernald has no entry of its own for palpable; he lists it under evident.
Where he writes about it:
Palpable and tangible express more emphatically the thought of manifest. — from evident